Deprecated Barley Wheat Smut-Specific IgE Antibody — Qualitative
This legacy allergy test looks for IgE antibodies to barley wheat smut, a fungus associated with cereal crops. A positive result indicates sensitization but must be interpreted with symptoms and exposure history.
["A positive result suggests an allergic sensitization to barley wheat smut, but it does not by itself confirm that the fungus is causing your symptoms."]
Key facts at a glance
- LOINC
- 21589-7
- Short code
- Deprecated Barley+Wheat smut IgE RAST Ql
- Synonyms
- Deprecated Barley+Wheat smut IgE RAST Ql
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
This test detects IgE antibodies directed against barley wheat smut, a fungal plant pathogen that affects cereal crops. Because it is marked deprecated, the test may appear only in older records or allergy panels.
Why might I need this test?
It may be included when evaluating a possible mold or fungal allergy, particularly in someone with symptoms such as sneezing, congestion, wheezing, or skin reactions after exposure to grain dust or moldy cereals.
How is the test performed?
A blood sample is collected and analyzed for antibodies specific to barley wheat smut. The result is reported qualitatively, generally as detectable or not detectable.
How do I prepare for the test?
No special preparation is usually required for a blood draw. Tell your clinician about your symptoms, possible exposures, allergies, and any medicines you take, because antihistamines and other treatments can sometimes affect allergy-test interpretation.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Barley Wheat Smut IgE Antibody Test
Frequently asked questions
What does a positive result mean?
Does a positive result prove that barley wheat smut is causing my symptoms?
Why is this test called deprecated?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy